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Fix to use previous value for parameters #10

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Fix to use previous value for parameters #10

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6 changes: 5 additions & 1 deletion lib/createChangeSet.js
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@
const _ = require('lodash')

const createChangeSet = (plugin, stackName, changeSetName, changeSetType) => {
const compiledTemplate = plugin.serverless.service.provider.compiledCloudFormationTemplate || {}
const compiledTemplateFileName = 'compiled-cloudformation-template.json'
const templateUrl = `https://s3.amazonaws.com/${plugin.bucketName}/${plugin.serverless.service.package.artifactDirectoryName}/${compiledTemplateFileName}`

Expand All @@ -22,7 +23,10 @@ const createChangeSet = (plugin, stackName, changeSetName, changeSetType) => {
'CAPABILITY_NAMED_IAM'
],
ChangeSetType: changeSetType,
Parameters: [],
Parameters: Object.keys(compiledTemplate.Parameters || {}).map(key => ({
ParameterKey: key,
UsePreviousValue: true
})),
TemplateURL: templateUrl,
Tags: Object.keys(stackTags).map((key) => ({
Key: key,
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17 changes: 17 additions & 0 deletions lib/createChangeSet.test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -133,5 +133,22 @@ describe('updateStack', () => {
)
})
})

it('should use previous value for parameters', () => {
serverlessChangeSets.serverless.service.provider.compiledCloudFormationTemplate = {
Parameters: {
param1: {},
param2: {}
}
}

return createChangeSet.bind(serverlessChangeSets)().then(() => {
expect(createChangeSetStub.args[0][2].Parameters)
.to.deep.equal([
{ ParameterKey: 'param1', UsePreviousValue: true },
{ ParameterKey: 'param2', UsePreviousValue: true }
])
})
})
})
})